News Details
Oil antioxidant
2018-1-3 12:03:27
Oil antioxidant
From the oxidation of many substances in the oil, but not all of these substances can do all the antioxidant use, must also have the following characteristics: strong antioxidant capacity, good oil solubility, volatile oil components and small; no chemical reaction, long-term use of excellent performance deterioration and damage of oil products and the use of performance not in water, no metal corrosion and related materials; equipment, equipment in the oil temperature does not decompose, evaporation, moisture etc.; feel good, can be applied to all kinds of oil. There are many kinds of antioxidants in oil products.
After analysis, it is found that the low content of antioxidant in oil has a strong correlation with the rapid deterioration of oil quality. The data also indicate that oil antioxidant can react with reactive radicals and peroxides generated in the process of oil self oxidation to form stable compounds, thereby eliminating the free radicals generated in oil and preventing the oxidation process of oil molecules themselves.
For turbine oil, because turbine oil is circulate in operation, it will absorb oxygen in air and react with oxygen to form an aging product. If the oxidation is mild, the product is soluble, that is, dissolved in oil, and has no obvious effect on the physical and chemical properties of the oil. If the oil oxidation is serious, insoluble sludge will produce a large number of acidic products, and these products will be acid related parts of the corrosion of equipment, sludge deposition in the coupling bearing channel, oil cooler, filter, the main fuel tank, the formation of the insulation layer can reduce heat transfer equipment. Excessive peroxide can also increase the viscosity of the oil, and affect the lubrication effect of the equipment.
In order to improve the oxidation resistance of the turbine oil. To ensure the long term use of oil in bad conditions. The usual practice is to add antioxidants to a deep and delicate base oil. However, as the running time of the turbine oil is prolonged, the antioxidants will be gradually consumed and should be added in time.
Factors affecting the oxidation stability of turbine oil. Steam turbine oil is an important type of industrial lubricating oil, which is often used in high power, high speed speed control device. The oxidation stability of turbogenerator oil is very important because of the longer use of turbine oil.
In recent years, with the increasing depth of base oil refining, composite antioxidant, metal reducing agent, using non silicon defoaming agent and demulsifying agent, make the turbine oil with little foam and air release and water quickly etc, the quality of domestic turbine oil has been greatly improved, the oxidation cycle by 1500h a 2000h to 3000h 4000h. The oxidation period of the turbine oil abroad is above 10000h and up to 14000h.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is the main raw materials of phenol, phosphorus oxychloride, phosphorus trichloride, phosphorus oxychloride, phosphorus trichloride belong to highly toxic chemicals, state control chemicals. Through raw material phenol, triclosan phosphorous and trichloride phosphorus, the direct method of trichloro phosphorus is used to direct (also known as thermal) and the indirect method of trichloride phosphorus (also known as cold method).
According to the relevant state regulations, tppi is currently exported to 9 kinds of dangerous goods.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is mainly used in PVC, polyethylene, polypropylene, polystyrene, polyester, abs resin, epoxy resin, synthetic rubber antioxidant stabilizer, used in polyvinyl chloride (PVC) products as a chelating agent.
Compared with the foreign turbogenerator oil, the domestic turbine oil still has a certain gap. How to extend the oxidation cycleof turbine oil is the focus of research at home and abroad. Next, I will discuss several factors that affect the oxidation stability of turbine oil.
The influence of its own composition on the oxidation stability of oil products. In the product oil of steam turbine oil, the mass fraction of the base oil is above 98%. The properties of the base oil determine the physical and chemical properties and the use performance of the finished oil. After the oxidation of base oil, the sediment, sludge and acid products are the fundamental reasons for the increase of oil viscosity, the corrosion of equipment, the decrease of service performance and the shortening of service life. Therefore, the composition of the base oil of the turbine oil has a great influence on the oxidation stability of the turbine oil.
The effects of hydrocarbons. Hydrocarbons in the base oil include saturated hydrocarbons and unsaturated hydrocarbons. Saturated hydrocarbons are mainly alkane and naphthenic hydrocarbons. Under ordinary conditions, the chemical properties of alkanes are very inactive. At the same time as carbon atoms, alkanes are smaller in density, smaller in viscosity and better in viscosity and temperature compared with other hydrocarbons.
In order to ensure the low temperature flow performance of lubricating oil, most of the long alkane or long side chain alkanes should be removed from lube raw materials during the refining process. Therefore, the content of long chain alkanes in the lubricating oil is very few.
Naphthenic hydrocarbons in base oils are mainly two ring and tricyclic naphthenic alkyl derivatives. Their chemical properties are similar to those of alkanes, but their oxidation stability is better than that of alkanes.
The unsaturated hydrocarbon in the base oil is mainly aromatic hydrocarbon, which is easy to oxidize and condensation to produce colloid and asphaltene. The aromatic hydrocarbons of the polycyclic short chain chain are more easily oxidized and are bad components in the base oil.
The oxidation induction period of the oil drops sharply with the increase of aromatics content, and the aromatics content in the base oil has a great influence on the oxidation stability.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
From the oxidation of many substances in the oil, but not all of these substances can do all the antioxidant use, must also have the following characteristics: strong antioxidant capacity, good oil solubility, volatile oil components and small; no chemical reaction, long-term use of excellent performance deterioration and damage of oil products and the use of performance not in water, no metal corrosion and related materials; equipment, equipment in the oil temperature does not decompose, evaporation, moisture etc.; feel good, can be applied to all kinds of oil. There are many kinds of antioxidants in oil products.
After analysis, it is found that the low content of antioxidant in oil has a strong correlation with the rapid deterioration of oil quality. The data also indicate that oil antioxidant can react with reactive radicals and peroxides generated in the process of oil self oxidation to form stable compounds, thereby eliminating the free radicals generated in oil and preventing the oxidation process of oil molecules themselves.
For turbine oil, because turbine oil is circulate in operation, it will absorb oxygen in air and react with oxygen to form an aging product. If the oxidation is mild, the product is soluble, that is, dissolved in oil, and has no obvious effect on the physical and chemical properties of the oil. If the oil oxidation is serious, insoluble sludge will produce a large number of acidic products, and these products will be acid related parts of the corrosion of equipment, sludge deposition in the coupling bearing channel, oil cooler, filter, the main fuel tank, the formation of the insulation layer can reduce heat transfer equipment. Excessive peroxide can also increase the viscosity of the oil, and affect the lubrication effect of the equipment.
In order to improve the oxidation resistance of the turbine oil. To ensure the long term use of oil in bad conditions. The usual practice is to add antioxidants to a deep and delicate base oil. However, as the running time of the turbine oil is prolonged, the antioxidants will be gradually consumed and should be added in time.
Factors affecting the oxidation stability of turbine oil. Steam turbine oil is an important type of industrial lubricating oil, which is often used in high power, high speed speed control device. The oxidation stability of turbogenerator oil is very important because of the longer use of turbine oil.
In recent years, with the increasing depth of base oil refining, composite antioxidant, metal reducing agent, using non silicon defoaming agent and demulsifying agent, make the turbine oil with little foam and air release and water quickly etc, the quality of domestic turbine oil has been greatly improved, the oxidation cycle by 1500h a 2000h to 3000h 4000h. The oxidation period of the turbine oil abroad is above 10000h and up to 14000h.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is the main raw materials of phenol, phosphorus oxychloride, phosphorus trichloride, phosphorus oxychloride, phosphorus trichloride belong to highly toxic chemicals, state control chemicals. Through raw material phenol, triclosan phosphorous and trichloride phosphorus, the direct method of trichloro phosphorus is used to direct (also known as thermal) and the indirect method of trichloride phosphorus (also known as cold method).
According to the relevant state regulations, tppi is currently exported to 9 kinds of dangerous goods.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is mainly used in PVC, polyethylene, polypropylene, polystyrene, polyester, abs resin, epoxy resin, synthetic rubber antioxidant stabilizer, used in polyvinyl chloride (PVC) products as a chelating agent.
Compared with the foreign turbogenerator oil, the domestic turbine oil still has a certain gap. How to extend the oxidation cycleof turbine oil is the focus of research at home and abroad. Next, I will discuss several factors that affect the oxidation stability of turbine oil.
The influence of its own composition on the oxidation stability of oil products. In the product oil of steam turbine oil, the mass fraction of the base oil is above 98%. The properties of the base oil determine the physical and chemical properties and the use performance of the finished oil. After the oxidation of base oil, the sediment, sludge and acid products are the fundamental reasons for the increase of oil viscosity, the corrosion of equipment, the decrease of service performance and the shortening of service life. Therefore, the composition of the base oil of the turbine oil has a great influence on the oxidation stability of the turbine oil.
The effects of hydrocarbons. Hydrocarbons in the base oil include saturated hydrocarbons and unsaturated hydrocarbons. Saturated hydrocarbons are mainly alkane and naphthenic hydrocarbons. Under ordinary conditions, the chemical properties of alkanes are very inactive. At the same time as carbon atoms, alkanes are smaller in density, smaller in viscosity and better in viscosity and temperature compared with other hydrocarbons.
In order to ensure the low temperature flow performance of lubricating oil, most of the long alkane or long side chain alkanes should be removed from lube raw materials during the refining process. Therefore, the content of long chain alkanes in the lubricating oil is very few.
Naphthenic hydrocarbons in base oils are mainly two ring and tricyclic naphthenic alkyl derivatives. Their chemical properties are similar to those of alkanes, but their oxidation stability is better than that of alkanes.
The unsaturated hydrocarbon in the base oil is mainly aromatic hydrocarbon, which is easy to oxidize and condensation to produce colloid and asphaltene. The aromatic hydrocarbons of the polycyclic short chain chain are more easily oxidized and are bad components in the base oil.
The oxidation induction period of the oil drops sharply with the increase of aromatics content, and the aromatics content in the base oil has a great influence on the oxidation stability.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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